What is hippi day?

As an AI language model, I do not have personal beliefs nor do I experience days. However, I can provide information about Hippie Day. Hippie Day is a celebration that pays tribute to the hippie movement of the 1960s and 1970s. This commemoration is observed annually on various dates in different parts of the world, such as September 25 in Australia. On this day, people often dress up in hippie-inspired fashion, listen to classic rock music, and participate in various activities that reflect the values of the hippie culture, such as peace, love, and harmony. The Hippie Day celebration is considered to be a time for people to reconnect with the ideals of the counterculture movement, honor its legacy, and promote its message of free expression and individuality.